How can you wean yourself from biting your nails when you yourself do not notice how your hands reach out to your mouth?

I agree with the other answers, only when I grew my nails to a decent look with incredible efforts of will, I just felt very sorry to gnaw them. I break off a couple of times a year during times of severe stress, but the rest of the time the desire not to walk in nibbles keeps me afloat)

At school, from time to time I had this problem. There was a simple way out of the situation - a special nail polish.
It is a transparent nail polish that has a pronounced bitter taste, which, moreover, is difficult to wash down with one sip of water. It was enough for me 3 times 'not to notice how the hands reach out to the mouth'.
I will not suggest the name, unfortunately ..
Search as "bitter varnish" :)

At the age of 15, he became infected with helminths. It does not bring much suffering, and it can be treated with one pill. But after that the desire to push something dirty into my mouth immediately disappeared)))

If you don't believe it, fix the bite. Yes, a long and expensive method, but even if I want to now, I cannot gnaw them - it does not work, it is inconvenient, it does not work at all